Roman numeral in introduction!

I am writing my thesis and using "documentclass{these}". My summary is like that:

Introduction

Firsrt result          ii
second result          iii 
third result            v

Chapter (title..)

First result            1
second result            2
third result             3

…etc

I would like to make the numbring as follows:

Introduction (here without numbring)

First result          
second result          
third result            

Chapter (title..)

........                5
......                  6
......                  7

…etc

I mean that the introduction (chapter 0) is without numbering and the first chapter start from the number of its page and not from 1 (I hope that the question is clear).

Thanks in advance and sorry for my English.